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Simplify mapAnnotations with the Bifunctor instance.

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Rob Rix 2017-05-08 11:53:23 -04:00
parent d1c9c69ed8
commit 4fe2a4cec1
1 changed files with 1 additions and 1 deletions
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src/Diff.hs
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@ -44,7 +44,7 @@ mapAnnotations :: (Functor f, Functor g)
=> (annotation -> annotation')
-> Free (TermF f (g annotation)) (Patch (Term f annotation))
-> Free (TermF f (g annotation')) (Patch (Term f annotation'))
mapAnnotations f = iter (\ (h :< functor) -> wrap (fmap f h :< functor)) . fmap (pure . fmap (fmap f))
mapAnnotations f = iter (wrap . first (fmap f)) . fmap (pure . fmap (fmap f))
-- | Map a function over the annotations of a single diff node, if it is in Free.
modifyAnnotations :: (Functor f, Functor g) => (annotation -> annotation) -> Free (TermF f (g annotation)) a -> Free (TermF f (g annotation)) a